Granted Patent
Utility
US 6,443,713 · App. 09/691,697
Diaphragm pump with support ring
Inventors:
Paul J. Weiss, Jeffrey J. Weiss
Patented Case
View Patent ↗
Granted: Sep 3, 2002
Filed: Oct 18, 2000
Inventors
Paul J. Weiss
Jeffrey J. Weiss
Assignee (at issue)
THOMAS INDUSTRIES, INC.
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.